2013 Fiscal Year Final Research Report
Study on spontaneous symmetry breaking in ultracold atomic gases
| Project/Area Number |
22340114
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
UEDA MASAHITO 東京大学, 理学(系)研究科(研究院), 教授 (70271070)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGUCHI Yuki 東京大学, 大学院・工学系研究科, 准教授 (00456261)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 自発的対称性の破れ / 冷却原子気体 / ボース・アインシュタイン凝縮 |
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| Research Abstract |
In this study, we have studied various types of symmetry breaking in ultracold atomic gases. Special focus is made on Bose-Einstein condensates (BECs) with spin degrees of freedom, systems subject to spin-orbit interactions, and fast-rotating Bose systems subject to synthetic gauge fields. As for the first topic, we have succeeded in developing spinor Beliaev theory which is the next-order theory beyond Bongoliubov theory, and used it to successfully explain the phase transition in spin-2 BECs. As for the second topic, we have found various types of quantized vortices and vortex lattices which arises from spin-orbit interactions. As for the last topic, we have found the quantum Hall effect of bosons.
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